Don’t make your compliments a burden.
If you give a generous compliment, you need to give the recipient of your compliment an escape. She may feel uncomfortable and overwhelmed by the severity of your words and need some relief from the pressure of being the center of attention. So, being a gentleman, do not merely throw a massive compliment at her but also be polite enough to give her the opportunity to graciously move on. Give her an outlet. Either by politely teasing her or by disqualifying yourself as a proper observer. I’ve more fully explained this here.